Rotational bands in neutron-rich 160,161,162Ho

D. Escrig; A. Jungclaus; B. Binder; A. Dietrich; T. Härtlein; H. Bauer; Ch Gund; D. Pansegrau; D. Schwalm; D. Bazzacco; G. de Angelis; E. Farnea; A. Gadea; S. Lunardi; D. R. Napoli; C. Rossi Alvarez; C. A. Ur

doi:10.1140/epja/i2003-10195-x

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2004) 21: 67-74
https://doi.org/10.1140/epja/i2003-10195-x

Rotational bands in neutron-rich ^160,161,162Ho

D. Escrig¹, A. Jungclaus²^,1^*, B. Binder³, A. Dietrich³, T. Härtlein³, H. Bauer³, Ch Gund³, D. Pansegrau³, D. Schwalm³, D. Bazzacco⁴, G. de Angelis⁵, E. Farnea⁴, A. Gadea⁵, S. Lunardi⁴, D. R. Napoli⁵, C. Rossi Alvarez⁴ and C. A. Ur⁴

¹ Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, E-28006, Madrid, Spain
² Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049, Madrid, Spain
³ Max-Planck-Institut für Kernphysik, D-69029, Heidelberg, Germany
⁴ Dipartimento di Fisica dell’ Universitá and INFN, Sezione di Padova, I-35131, Padova, Italy
⁵ Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020, Legnaro, Italy

^* e-mail: andrea.jungclaus@uam.es

Abstract

High-spin states in ^160,161,162Ho have been populated in the reactions ^158,160Gd(⁷Li, xn) at 56 MeV. In all three isotopes the known rotational bands have been extended to significantly higher spin. In ¹⁶⁰ Ho, the band crossing in the 7/2^-[523] 11/2^-[505] band has been observed for the first time. The sequences built on the proton 7/2^-[523], 7/2⁺[404], 1/2⁺[411] and 1/2^-[541] states in ¹⁶¹Ho have been extended up to spin 51/2^-, 35/2⁺, 51/2⁺ and 41/2^-, respectively, leading to the first observation of upbends in all four cases. In addition, a new band most probably belonging to this nucleus has been identified. In the most neutron-rich isotope ¹⁶²Ho, the only known rotational band, which is built on the 7/2^-[523] 5/2⁺[642] configuration, has been extended up to the 28^- state. The properties of all observed bands are discussed and compared to the neighbouring isotopes.